Window-glass blowing or drawing machine.



H. E. DE VAUGHN.

WINDOW GLASS BLOWING 0R DRAWING MACHINE.

APPLICATION FILED NOY. 9, 13M.

Patented June 13, 1916.

HARRY E. DE VAUGHN, OF MORGANTOWN, WEST VIRGINIA, ASSIGNOR TO WALTER A.

JONES, OF MOBGANTOWN, WES T VIRGINIA.

1 wInnow-GLAss BLownveoB DRAWING MACHINE.

Specification of Letters latent.

- Patented Ju e 13,1 o1e.

Application filed November 9, 1914'. Serial No. 871,077. I

I To all whom it may concern the air supply of a glass drawing machine.

- A further object is to provide meansfor obtaininga variable relief of the air pressure.

claims.

In the accompanying drawingi Figure 1'- is a side view of a portion of a glass drawing machine with my invention applied thereto. Fig. 2 is alongitudinal sectional view of my improved telescope cup and air relief valve. Fig. 3 is a transverse sectional view thereof. Fig. 4' is a detail perspective viewillustrating the cam slot.

Referring to the drawing, the cup 10 is formed of a hollow cylindrical bodyf having a cup, 11 removably secured to one end thereof, and a reduced threaded porti0n12 at the other end, said threaded poption terminating in a shoulder 13-. The body 10 is also threaded at 14 below the shoulder 13.

- Said body is also provided with vent openings 15 and 16, the opening 15 being smaller in volume than that at 16. The exterior surface of the body.10 is provided with a recess 17 having depressions 18 and 19, as clearly illustrated in Fig. 1.

Rotatably mounted upon the body 10 is an eccentric'ring or valve 20, provided with a threaded opening ,to' engage the correspondingly threaded portion 21 of a handle 22, said handle having a projectiQnQS engagin the recess 17 and depressions 18 and .19. aid valve is provided? with avent opening 2 1, and is held against the flange 11 of cup 11 by a spring 25, one end of which bears against the valve 20, the other end engaging a nut 26 working on the The invention will be hereinafter fully setforth and particularly pointed out In the A threaded portion 14. The tension of the spring 25 is varied byadjusting said nut, and the latter is held in adjusted position by a lock nut 27. case hardened, and is flared interiorl'y as indicated at 28 to effect an air tightjoint with the pipe tip 29 of the blow pipe stem 30 carrying the bait 31, and the telescope orair line 32 is connected with the body 10 at the threaded portion 12.

Iiroperation, when the bait is placed in position for lowering it into' the molten The cup 11 is preferably" glass, in the usual manner, the ring 20 is ad justed .to the position indicated in dotted lines, Fig. 2, the opening 2 1 being opposite the vent opening 15 to permit of the usual venting of the system. The valve is locked inthis positionby reason of the pressure of spring 25 forcing the projection 23 of han-' dle 22 into the depression 18. After making the neck and cam of the glass cylinder, the air pressure must be reduced. This is accomplished bv moving the ring or valve 20 to the position shown in full lines, Fig. 2, so that the opening 24 is directly over the opening 16.- As the ring is rotated, the spring 25 yields sufficiently tpermit the projection$23 to-rideover the high portion of the slot 17, and force said projection into the depression 19 to lock thevalve in its new position.

It will be-understood that the sizes of the openings 15, 16 and 24, may be varied to give the pressure'required, and nut-26 may be. adjusted, as may be necessary,'to insure that the projection 23 will be forced into either depression 18 or 19, when the valve had reached its respective limitsof rotation.

Having thus explained the nature .of my invention and described an operative mannor of constructing and using the sarne', al

though without attempting to set forth all of the forms in which it may be made, or all of the forms of its use, what I claim is 1. As an improvement in glass drawing machines, a combinedcoupling and relief valve comprising a cylindrical body shaped to engage one end of a blow pipe stem and provided with spaced apart vent openings of different volumes, and a valve ring rotatably mounted upon said body and having an opening adapted to register with eithe ofsaid vent openings.

2. As an innrovement in lass drawin machines, a combined coupling and relief valve comprising a cylindrical body provided with spaced apart vent openings of preventing rotation of said valve ring when the opening thereof is in register with either of said vent openings.

3- As an improvement in glass drawing machines, a combined coupling and relief valve comprising a cylindrical body provided with an annular flange at one end and also with spaced apart vent openings of different volumes, a valve ring rotatably mounted upon said body and having an opening adapted to register with either of said vent openings. a spring pressing said valve against said flange. and an abutment for the other end of said spring.

4. As an improvement in glass drawing machines, a combined coupling and relief valve comprising a cylindrical body provided with an annular flange at one end and also with spaced-apart vent openings of dif-= ferent volumes. a valve ring rotatably mounted upon said body and having an opening adapted to register with either of said vent openings. a spring pressing said valve against said flange. an abutment for the other end of said spring, and means cooperating with said spring for normally preventing rotation ol' said ring when the opening thereof is in register with either of said vent openings.

5. As an improvement in glass drawing machines. a c mbined -coupling and relief valve comprising a cylindrical body provided with an annular flange at one end and also with spaced apart vent openings of different volumes, a valve ring rotatably mounted upon said body and having an opening adapted to register with either of said vent openings, a spring pressing said valve against said flange, an abutment for the other end of said spring, and a projection carried by said ring. said cylindrical body having a recess provided with locking depressions to receive said projection.

6. As an improvement in glass drawing machines, a combined coupling and relief valve comprising a cylindrical body provided with an annular flange at one end and also with spaced apart vent openings of different volumes, a valve ring rotatably mounted upon said body and having an opening adapted to register with either of said vent openings, a spring pressing said valve against said flange, and an abutment for the other end of said spring, and an operating handle for said ring provided with a projection, said cylindrical body having an operating 8. As an improvement in glass drawing machines, a combined coupling and relief valve comprising a cylindrical body having an annular flange and spaced apart vent openings, the surface of said body being provided with a recess having depressions corresponding to said vent openings valve ring having an opening adapted to register with either of said vent openings, an adjusting nut carried by said body, a spring interposed between said nut and said ring, and handle for said ring provided with a projection extending into said recess.

9. As an improvement in glass drawing machines. a combined coupling and relief valve comprising a cylindrical body provided with an annular flange at one end and also with spaced'apart vent openings of difhaving depressions, said recess and depressions being covered by said ring, and a projection extending interiorly from said ring into said recess 10. As an improvement in glass drawing machines, a combined coupling and relief valve comprising a cylindrical body, a cup removably connected to said body and provided withan annular flange, said body being provided with an annular flange at one end and also with spaced apart vent openings of different volumes, a valve ring rotatably mounted upon said body and having an opening adapted to register. with either ot said vent openings, a spring pressing said valve against said flange, and an abutment for the other end of said spring.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

HARRY E. DE VAUGHN. 

